Term used for the sex act known as either ass to pussy, A2P, ATP or spetic vagina. This invloves the active partner swapping between fucking the ass of a woman to fucking the pussy of a woman multiple times during sex. The cock or object will not usually be washed making for a higher chance of infection.

"That bitch loved it last night when I tried some Double Dipping with her, she has probably got a shitty pussy now but I don't care."

v. 1) Dipping twice into any kind of salsa, dip substance, ect after already taking a bite from a chip or other food object.
2) A sexual encounter involving both biting or nibbling, while engaging in humping or lunging on another individual.

In the film Bram Stoker's Dracula there is a scene where the monster (wolf-man) Dracula is having sex with Mina Harken's red-headed girlfriend, while biting her. Dracula's sexual moves are double-dipping, which for him involves the drinking of one's blood, while having sex with them.